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(No Mbdel.) 3 Sheets-Sheet 1.

0. A. GRAPE.

SLIDING PLANEB No. 304,724. Patented Sept. 9, 1884.

(No Model.)

3 Sheets-Sheet 3. C. A. GRAPE.

SLIDING PLANER.

Patented Sept. 9, 1884.

N PETERS Pmwmho w. Washinglan. ac

OHRISTOPH ANTON GRAFF, OF NEW YORK, N. Y., ASSIGNOR TO HENRY W. ERIOHS,OF SAME PLACE.

SLIDING SPECIFICATION forming part of Letters Patent No. 304,724, datedSeptember 9, 1884.

Application filed May 29, 1884. (No model.)

board-holder, which is placed on one end of the machine. Fig. 4 is avertical central section of the same. tical section of the planer usedon the machine. Fig. 6 is a detail top View of the plate through whichthe planing-knife is to protrude. Fig. 7 is adetail face view of thepressure-roller guide whichis used on the said machine. Fig. Sis acentral section of the same. Fig. 9 is a bottom View of the pressuredevices that are used on the machine.

This invention relates to a new machine for planing thin boards, such asare used for making cigar-boxes or analogous devices.

The object of the invention is to make the machine automatic throughout,and to plane the boards on one or two sides by the use of therein androtated by the means hereinafter stated, or other suitable mechanism. Acrank, a, on the shaft B connects by a rod, 0, with a horizontal slide,D,which lies flat on the frame of the machine. The rod 0 is extensible,as

shown in Fig. 2, to vary the stroke of the slide 1).

E is the pile of boards to be planed. The boards lie one on top of theother on the frame of the machine, in front of the slide D. This Fig. 5is an enlarged ver-.

pile of boards is held in place by the boardholder F, which consists ofa front plate, b, side plates, at e, and a back plate, f. The frontplate, 6, is firmly attached to uprights g, which are firmly secured tothe frame A of the machine. A right-and-left screw, h, which is hungtransversely in the uprights (see Fig. 3,) engages with nuts h on theplates (1 e, so that by turning said screw the said side plates, at 6,maybe adjusted and set a suitable distance apart. The back plate, f, ishung by a trunnion in a slotted extension, d'-, of theplate (I, and isclamped in the desired position by a thumb-screw, All the plates 1), d,e, and do not extend down into the way of the path of the slide D. Theplate f need not extend from the plate d clear over to the plate e, butmay be made considerably shorter than that distance, as is indicated inFig. l. The plate 6 need not be as high as the plate d, as appears bydotted lines in Fig. 3. The said board-holder F is also provided with avertically-adjustable foot, t, which is raised or lowered by a screw, i(see Figs. 3 and 4,) to permit thicker or thinner boards to pass beneathit. This foot is shown in Fig. 2 directly above one of the boards thatis to be planed. The lowermost board of the pile E rests on a platform,j, which is fixed in the frame A. As the slide D is moved forward itpushes the lowermost board of the pile E forward from under the pileinto engagement with a set of feed-rollers, G'G and H H, that are hungin the frame A above and below the said board.

Between the feed-rollers G G, and between the feedrollers H H, areinterposed stationary blocks I I, which also serve as guides for theboard. \Vhen the slide D is moved back, as in Fig. 2, it allows the pileof boards to drop down upon the platform j, thereby bringing anotherboard in front of said slide, to be pushed. ahead at the next forwardmotion of said slide. The rollers G G are hung in adjustable bearings,which are pressed down by suitable springs and screws, or either. Theseveral rollers G G carry toothed wheels Z Z at their ends, which engagewith toothed wheels on m, that are mounted on the rollers H H, and theseagain are in gear with a toothed wheel,

n, on the shaft J, which is hung in the frame A of the machine, andwhich is the drivingshaft. The shaft J is rotated by suitable means, andwhen rotated causes the rollers G G and H H to be revolved, so as tofeed the boards which are pushed between them by the slide D along tothe planers. The shaft J also carries the truncated conical pulley 0,which is connected by a belt, 1), with a truncated conical pulley, q,that is mounted upon the shaft 13. By adjusting the belt on theseconepulleys the relative speed of the slide D, as compared with that ofthe rollers G H, can be easily regulated. The rollers G H feed theboards that are inserted between them along until they arrive above theplaning-irons L and M, which are secured in the frame A below the saidboards. Above the boards, when they arrive in contact with the planers,are suspended the series of pressure-guides N N, O, and P. Thepressure-guide O is a horizontal plate, which is connected by uprightrods 0' with a crossbar, s, which is a fixture of the frame A. The rods0 allow the plate 0 to move up and down as they (the said rods) passfreely through the cross-bar s. The pressureguides N N, which are morefully shown in Figs. 7 and 8, are transverse frames, having rollers hungin their lower parts, each of said frames having at its upper part anadjustable screw, it, the head of which bears against the under side ofa hinged plate, a. This plate is hinged at one end to the frame of themachine, and at the other end placed beneath a spring, 1;, which allowsthe plate a to yield upward, and with it also the frame N, which isbeneath it. The same description applies to both frames N that are shownin Fig. 2. After the board has been planed by the lower planers, L M, itpasses under a springguide, P, which is a plate suspended by itsspring10 from the stationary framing of the machine. The planers L and M arealike in construction. A larger view of one is given in Fig. 5. Fromthis figure it appears that the planing-knife proper, a, and its cap I)are held in inclined position against the inclined face of thesupporting-block d", which supporting-block is set into the frame A ofthe machine.

The means of holding the knife a and its cap b to the block d is ascrew, e and alarge washer, f. The block (1? is mortised vertically atthe place where the planing-knifeprotrudes through it, and this mortiseis closed on the non-working side of the knife by a detachable plate,which is let into a recess of the block (1, that is provided for itsreception in said block. By removing this plate 9 convenient access ishad to the cutting-edge for purposes of inspection, cleaning, andsharpening. I

Fig. 6 is a top view of a block, 6?, showing the plate inserted therein,and showing also the oblique direction of the slotthrough which theplaning-knife protrudesthat is to say, the planing-knife itself standsobliquely to the direction of movement of the board. After the boardshave been planed on their lower sides by the planers L M, and after theyhave passed the pressure-plate 1?, they may also be planed on thismachine on their upper side, for which purpose I have placed a planer,R, above the table of the machine, as shown in Fig. 2. This planer R inits construction resembles the planers L and M. If used, it is fastenedto the machine by downwardly-projecting bolts h,which are embraced bysprings i, as shown, so that the upper planer, It, will be verticallyyielding, and will, in fact, 0011- So stitute an elastic pressure-plate.

The operation of the machine, as far as it has not yet been described,is as follows: The slide D pushes the lower board of the pile E intoengagement with the feed-rollers G H,

hen the boards arrive above the planers L, 5

their lower faces are planed in the rough, as it may be termed, and theyare then subject to the second planer M, by which their lower sides aremade perfectly smooth. The

planers L and M stand obliquely for the pur- 10o pose of reducing thestrain, and also to facilitate the discharge of the shavings. Stationaryplaners beneath the boards to be smoothed are preferable to rotaryplaners that are now usually employed, because they produce continu- I05ous cuts, instead of the successive hack-like cuts that are produced byrotary planers.

In a cigar-box it is quite essential that the outer sides of its boardsshould be perfectly planed; hence the lower sides of the boards in mymachine, which are to constitute the outer sides of the box, are planedwith great care, the said boards being held against the planers by thespring pressing devices N N.

These spring pressing devices, being provided I 1 5 with rollers, avoidall unnecessary friction. The upper planer R, which finally planes theupper face of each board, is preferably of the construction shown; but,if desired, a rotary planer may be employed, as it is not so essen- 12otial that both sides of the boards receive equally good treatment.

The frames N N, which, as already stated, have rollers hung in theirlower parts, have these rollers so hung that they are capable of I2 5tilting to accommodate boards which may not reach them in a horizontalplane. To this end there is centrally pivoted into the lower part ofeach frame N a plate, Z and into two plates Z thus pivoted are hung therollers j. 1 0 The plates Z constitute a pivotal frame for the rollerswhich is allowed to tilt if a board should reach the rollers in anotherthan a per- The pivots of the fectly horizontal plane.

The boards are 0 plates Z Z are placed in the same direction as the axesof the rollers j jz'. 6., transversely -to the motion of the boards.

. I claim- 1. In a planing-machine, the combination of the crank-shaft Bwith the extensible rod 0, reciprocating slide D, and holder F, havingadjustable back plate, f, substantially as herein shown and described.

2. The combination, in the board-holder F, of the stationary face-plateb, with the rightand-left screw h, carried in nuts h, side boards, (I e,carrying said nuts, and adjustable back plate, f, carried by said sideboards, substantially as herein shown and-described.

3. The combination of the reciprocating slide D with the boardholder F,adjustable foot i, and rollers G and H, substantially as described, forfeeding the boards that have been pushed by the slide D, as set forth.

4. The combination of the planing-knife a and its cap b with the block(2 having inclined face, screw 0 and obliquely-placed detachable plate 9substantially as described.

5. The frame N, having rollers in its lower portion, combined with thescrew t, hinged plate a, and spring 11, the said hinged plate atbeinglocated below said spring and above said screw, substantially asdescribed.

6. The combination of the board-holder F 0 with the slide D, rollers GH, and separate planers L M, both of which are located beneath theboards to be planed, as specified.

7. The combination of planers L M, placed underneath the boards to beplaned, with the adjustable spring '-pressure device N and separateterminal pressurespring P, substantially as described.

S. The combination of the vertically-adj ustable frame N with therollers 9' and pivoted 40* roller-frames Z, the pivots of the frames Zbeing placed in the same direction as the axes of the rollers j, asdescribed.

CHRTSTOPH ANTON GRAFF.

Witnesses GEO. FISCHER, LUDWIG GLoEcKNER.

